How to measure an oil seal

How do you measure an oil seal?

This is the question that our customers often ask us at Samma Parts, it is an essential question and the method that is normally used in the world of transmissions, mechanical seals and oil seals must be correctly indicated radial with measurements in both inches and metric.

Radial oil seals with measurements expressed in the metric system are identified by the following measurements:

  • Internal diameter expressed in millimetres
  • External diameter expressed in millimetres
  • Height or thickness of the oil seal expressed in millimetres

It therefore appears clear that the first measure is always lower than the second and are expressed in whole numbers. Furthermore, generally, on the oil seals of most brands on the market and those marketed by us at Samma Parts, these measurements are stamped on the body of the oil seal, clearly visible to allow it to be uniquely identified and without any doubt.


Type of oil seal

The oil seals on our store are universal and are divided into two macro categories, oil seals in NBR rubber or nitrile rubber, they are standard oil seals commonly used in any mechanical field, as a seal for oily fluids. The NBR rubber oil seals are available in WAS execution, this acronym identifies the radial oil seal with internal dust protection lip.

For applications at high temperatures, such as applications on turbo engines, fluorinated rubber oil seals are available, defined with the acronym FKM, and more commonly referred to as viton oil seals. This type of elastomer can be recognized by its surface color, a brown finish.

Choose the one best suited to your needs by clicking here